"We have served a notice to the MLA to appear in GRP Patna by 5 PM tomorrow for questioning in the matter," Railway Superintendent of Police P N Mishra said.

"A summon notice has been sent to the MLA on WhatsApp and also through Jokihaat police station in his native place," the SP said.

He said a probe team, which had gone to Mughalsarai and New Delhi for recording statements of the complainant and the train superintendent of Dibrugarh-New Delhi Rajdhani Express, has returned.

According to the complaint, the incident occurred on January 17 when Alam, third time JD(U) MLA and son of RJD MP Mohammad Taslimuddin, misbehaved with the couple on board the train. An FIR was registered against him with GRP Patna the next day.

The MLA was alleged to have been travelling without ticket and was drunk. Train Superintendent Saheb Singh, in his statement, said Alam was travelling in the Rajdhani Express on that day without ticket, the SP said.

Alam, however, said he has not got any notice so far in this regard. Stating that he is a law abiding citizen and respects judiciary, the JD(U) MLA said there was a 'high level conspiracy' behind the allegation.